Circulatory System Quiz 18 (20 MCQs)

Quiz Instructions

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1. What do capillaries, the smallest blood vessels, do?

Correct Answer: C) Exchange nutrients and oxygen for waste.

2. Why is the left lung slightly smaller than the right lung?

Correct Answer: A) To give space for the heart.

3. Which of the following is the main organ of circulatory system which pumps the blood all throughout the body?

Correct Answer: C) Heart.

4. Disease affecting arterial blood vessels by the buildup of plaque on the inner lining of the arteries causing them to narrow and be less flexible

Correct Answer: A) Atherosclerosis.

5. Abnormal death of the heart muscle

Correct Answer: D) Myocorononecrosis.

6. The circulating form of erythrocytes does not have a nucleus.

Correct Answer: A) True.

7. Receives oxygen-rich blood from the lungs

Correct Answer: A) Left Atrium.

8. Organ located on top of the trachea that contains thevocal chords

Correct Answer: C) Larynx.

9. Either of the two lower chambers of the heart that pumps blood through arteries.

Correct Answer: A) Ventricle.

10. Which component of blood is responsible for carrying carbon dioxide?

Correct Answer: D) Plasma.

11. What condition can result in the mixing of oxygenated and deoxygenated blood in the heart?

Correct Answer: D) Atrial septal defect.

12. Student JM is tasked to identify the atrioventrilar valve that prevents backflow between the left atrium and ventricle. What must his answer be?

Correct Answer: D) Bicuspid/Mitral Valve.

13. The injured tissue cells and platelets which disintegrate at the site of the wound release a substance called .....

Correct Answer: B) Thromboplastin.

14. In normal people, on average, how long does the heart completely rest during each cycle?

Correct Answer: B) 0.4 seconds.

15. Which organ is responsible for pumping blood throughout the body?

Correct Answer: D) Heart.

16. The type of muscles present in the heart.

Correct Answer: A) Cardiac.

17. The tissue fluid that is remained among tissues is being removed by.....

Correct Answer: C) Lymphatic system.

18. The heart is formed by a thick Wall of muscle tissue named .....

Correct Answer: A) Myocardium.

19. Arteries carry nutrient and oxygen rich blood ..... from the heart.

Correct Answer: B) Away.

20. Hemoglobin picks up.....

Correct Answer: C) CO₂ and O₂.